What is the percent by mass of sodium in Na2SO4? total mass of element in compound molar mass of compound Use %Element x 100
question 1
moles = mass/molar mass of Al(OH)3
convert Kg to g
that is 1.09 x 1000=1090g
moles is therefore=1090g/78(molar mass of Al(OH)3)= 13.974 moles
question 2
moles=2.55g/327.2(molar mass of Pb(CO3)2= 7.79 x 10^-3 moles
from avogadro constant
1moles=6.02 x10^23 formula units
what about 7.79 x 10 ^-3
={(7.79 x 10^-3)moles x ( 6.02 x10^23)} /1 mole=4.69 x10^21 formula units
Two hydrogen atoms interact to form a hydrogen molecule. The bond that would be present in these atoms would be covalent bonding. A covalent<span> bond is a chemical bond that involves the sharing of electron pairs between atoms. Hope this answers the question. Have a nice day.</span>
Uh, not sure if you're asking or not, but during beta decay TI-207 emits a beta particle.